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The last 7 posts

See if all the zone valves are of the same mfg'r and they have the same solenoids.... use those resistance readings as a guide to what those that don't work are.
Some solenoids today have resistances in the 25 ohm area and the older Richdel and Garden America solenoids, are in the 20 ohm area. In ANY case, replace soleoids that are 18 ohms or less in resistance.
b.

You test the zones for resistance, from zones to Common. Good ones show about 50 to 100 ohms resistance. The Fluke will have a special 'low voltage' ohms setting, for testing resistances. Use that, and compare readings between operational zones and faulty ones.

Electrical Surging

This is an existing System, there are 11 zones. This system is a rainbird system. Only 3 zones would work with the clock out off 11, Changed clock to a hunter pro-c 3 station clock with 3-3station modules to gove me the 11 zones. Now with new clock installed, i now have 8 of the 11 zones working electrical and the other 3 only working manually. There a 2 zones when programmed with time on the manual station setting will show on controller for a quick second and then go right to the next zone, will not even stay on long enough to test it, what might be the problem?? The third zone will stay on and show time but the valve will not come on, is this a switched wire on the valve or?? Any suggestion would greatly be appreciated, Thanks